Home / 8,720.87-12,028.70-5,735.75

Finding the Fourth Proportional to 8,720.87, 12,028.70 and 5,735.75

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Solution

The fourth proportional to 8,720.87, 12,028.70 and 5,735.75 is: 7,911.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.87 : 12,028.70 = 5,735.75 : x
  2. Step 2: Convert to fraction form
    8,720.87/12,028.70 = 5,735.75/x
  3. Step 3: Cross multiply
    8,720.87x = 12,028.70 × 5,735.75
  4. Step 4: Simplify right side
    8,720.87x = 68,993,616.03
  5. Step 5: Solve for x
    x = 68,993,616.03/8,720.87
  6. Step 6: Final answer
    x = 7,911.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.